I have to leave it running.. I have some wet cushions! I haven't been in it for any period of time since thanksgiving, so didn't notice.

I think it is just pooled condensation as the moisture is limited to things well below the windows (Curtains are fine and show no signs of staining) and there are some drips pooled on top of the cloth shower curtains I have as covers.

They appear to work, the tops of the cushions are bone dry and the only wet parts are where the shower curtains didn't cover.. on the bottom between the top of the bench and the cushion bottom.